This chapter is only intended as an introduction to GRUB. Consult the following resources to discover more about how GRUB works.
/usr/share/doc/grub- — This directory contains good information about using and configuring GRUB, where <version-number>/<version-number> corresponds to the version of the GRUB package installed.
info grub — The GRUB info page contains a tutorial, a user reference manual, a programmer reference manual, and a FAQ document about GRUB and its usage.